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A Solar System Similar to Ours, but More Compact
Topic: Cosmic Evolution
11/29/13
Summary: Astronomers have found the closest match to our own solar system yet known.

Which Ancient Minerals Helped Give Rise to Life?
Topic: Geology
11/29/13
Summary: A new study challenges the idea that mineral species on Earth today are much the same as they were billions of years ago when life first arose on our planet.

Astro-virology
Topic: Alien Life
11/28/13
Summary: Studies of the history of viruses on Earth can inform our understanding of the possibility for life elsewhere.

Defying Gravity, Part 10
Topic: Moon to Mars
11/28/13
Summary: Tenth on our list of spacewalking women is astronaut Nicole Stott. She performed her EVA from the International Space Station. Stott was also on the crew that holds the record for the longest aquanaut mission in the Aquarius research habitat.

MESSENGER Captures Images of Comets Encke and ISON
Topic: Meteorites, Comets and Asteroids
11/27/13
Summary: In a showcase of opportunistic science, NASA's MESSENGER spacecraft at Mercury has captured images of the comets ISON and Encke.

Unusual Greenhouse Gases May Have Raised Ancient Mars Temperature
Topic: Mars
11/27/13
Summary: Scientist modeling the early atmosphere of Mars have shown that the right balance of carbon dioxide, hydrogen and water could have made Mars warm enough for liquid water to persist at the surface.

New Models Aid the Search for Earth-like Planets
Topic: New Planets
11/26/13
Summary: New theoretical models could make the search for habitable planets easier.

Acid Rain, Ozone Depletion & the Permian Extinction
Topic: Earth
11/26/13
Summary: A new study shows that massive volcanic eruptions and acidic rain could have played a role in the Great Dying - the largest mass extinction yet known in Earth's history.

Signs of Life on Dying Planets
Topic: Alien Life
11/25/13
Summary: If life does exist anywhere else in the universe, it may only be fleeting. Now scientists are researching how signs of life might look on dying planets.

Defying Gravity, Part 9
Topic: Moon to Mars
11/25/13
Summary: Ninth on our list of spacewalking women is astronaut Sunita Williams. With seven EVAs beneath her belt, Williams is the reigning queen of spacewalks.

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